Process of working enameled leather and the like with skiving or splitting machines.



H. KLAEGER.

PROCESS -OF WORKING ENAMELED LEATHER AND THE LIKE WITH SKIVING 0R SPLITTING MACHINES.

APPLICATION FILED MAY [2, I914.

1,21 1%,1 78. Patented Jan. 30, 1917.

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HERMANN KLAEGER, on CANNSTATT-STUTTGART, GERMANY, essienon TO Forerunn- WERKE, SPEZIALMASCHINENFABRIK, GESELLSCHAFT MIT BEsoHnAnKTEn I-IAF- TUNG, or CANNSTATT-STUTTGART, GERMANY, A CORPORATION oFGERMAnY.

PROCESS OF WORKING ENAMELED LEATHER AND THE LIKE WITH SKIVING OB, SPLITTING MACHINES.

Specifidation of Letters Patent.

Patented Jan. so, 1917.

Application filed May 12, 1914. Serial No. 837,997.

To all whom it may concern.-

Be it known that I, HER AN): KnAncnR, a citizen of the German Empire, andresident of Cannstatt-Stuttgart, in said German Empire, have invented certain new and useful Improvements in Processesof Working Enameled Leather and the like with Skiv- 'ing or Splitting Machines, of which the following is a specification.

This invention relates to methods of skiving or splitting enameled leather and the like, and has for its object to provide an improved process for obtaining efficient results in the skiving or splitting of enameled leather or the like.

In the leather skiving and splitting machines heretofore used, it was usual to feed to a rotating knife, as, for instance, a ringknife, the leather to be skived or split by means of a feeding device consisting of a roller, and to hold the leather so fed at the cutting point of the knife by means of a special device, known as a presser-foot, whereby the slipping of the leather was prevented and the leather was held in the desired inclined or parallel position. Bars, feet. or the like, made of a suitable material, as, for instance, steel, were used as presserfeet, which either were stationary or rotatable, and in the event that they were rotatable they were shaped as rollers. In general, with such an arrangement very good results were obtained. The skiving or splitting of enameled leather or the like, however, caused certain unexpected difficulties, in that the cut of the knife was irregular, so that soon more or less of the material was cut away than was intended. It has been found that this difficulty is caused from disturbances in the feed, and that these disturbances had their cause therein, that during the process of cutting (skiving or splitting) the leather became heated and in consequence thereof became sticky at the socalled enameled surface, and that it there fore at times would stick to the presser-foot.

By the use of the present invention, which will now be described and an embodiment of an application of which is shown in the drawings, all these disadvantageous features are obviated, and in the cutting of enameled or similar leather, which has a surface which easily gets sticky, a very equal fine oil layer at this point is sufficient to prevent completely all of the above-mentioned disadvantageous features.

In the accompanying drawings, Figure l is a front-view of a press-er-foot of wellknown construction such as used in skiving or splitting machines of the type on the market known as the Fortuna machine,

Fig. 2 is a vertical transverse section taken on line 22 of Fig. 1, Fig. 3 is a front-view of a presser-foot with a modified form of an application of my invention, Fig. 4 is a section of another modified form of an application in which individual channels are provided for the distribution of the oil, Fig. 5 is a front-view of another modified form of an application of my invention, and Fig. 6 is a section on line 6-6 of Fig. 5.

Similar reference characters indicate corresponding parts throughout the differentfigures.

Referring to the drawings, and more particularly to Figs. 1 and 2, the presserfoot a is typical of that used in the machine known on the market as the F ortuna machine, and is therefore not described in detail as the operation thereof is well known in the art. This presser-foot a is provided with a cut-out portion Z) in which a piece 0 of felt or the like is seated and is movable therein. This piece 0 of felt may be of a shape corresponding to a crescent or halfmoon, and extends at its lower end slightly beyond the working surface of the presserfoot 0:, as indicated by 0 Above the piece 0 is arranged a member or yoke cl, which has adapted to receive oil or similar material, which then flows from the enlargement a through the bore 6 into the opening (Z of the yoke cl and then distributes itself in the layer of felt 0, a part of it gathering at the lower edge By means of the screw 6 and the operation of the felt piece 0, which is arranged along the working surface 7 of the presser-foot, a very fine layer of oil is caused to take place on the leather which is being skived or split, just at that place where it is likely to stick to the presser-foot. When the edge 0 of the felt layer a is used up, the layer 0 may be readily advanced to take up this usage by means of rotating the screw 6, which thereby presses downwardly the yoke d, and consequently presses downwardly the layer 0.

An advantage of the embodiment just de scribed and shown in Figs. 1 and 2 results from the arrangement therein shown and consists in having the oiling device so arranged that it does not take any special room.

Another embodiment of the invention is shown in Fig. 3, in which the layer of felt is pressed by means of the helical spring 8 downwardly, which may have a yoke.

Another embodiment is shown in Fig. l, in which the presser-foot is provided with a plurality of chanels m which are fed from a main-channel n, and which in turn is fed from the bored screw 0.

Still another embodiment is shown in Figs. and 6, in which the oiling device is arranged at the out-side of the presser-foot, which oiling device consists of the funnel 7), the tube Z, and the distributing-end 1", and which oils the surface before the material is pressed by the working surface of the presser-foot, in that it drops or sprays the oil on the material.

From the embodiments shown, it will be seen that the oiling means shown, be it by means of the felt, the channels, or equivalent means, the material to be SklVGd or split is coated with a fine layer of oil, just at that place where it might stick.

I have shown various applications of my invention, but changes may be made in the invention without departing from the spirit of the same as defined in the appended claim.

I claim:

An improved method of skiving or splitting enameled leather or the like, which consists in subjecting enameled leather to a forward feeding pressure simultaneously on its enameled surface and on its inner surface for feeding it under restraint to a. skiving or splitting knife, and providing on the enameled surface while so pressed during its cutting or skiving, an interposed fine layer of a lubricating fluid, whereby the sticking of the enameled surface of the leather is prevented, and the feeding of the material to be worked is not impeded.

' In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

HERMANN KLAEGER. Witnesses: ERNEST ENTENMANN, FRIDA KLAIBER.

Gopics of this patent may be obtained for five cents each, by addressing the commissioner 01' Eatents. Washington, D. C. 

